33 
occasionally. To tlie rear of these man^a-oves there is 
developed in places a band of (Ui>marina (jlauca sometimes 
witli Hihiscus tHiarcus and over them are often found the 
scrambling Wedrlia hiffoi-a I)(b and the twining Vincr- 
ioxicum rarao.swoa Reuth. Kxce]d wbere the encroaching 
dunes abnt directly on the mangroves the latter are re- 
placed landwards by a narrow meadow of Sporhoius 
rirginictis, witii some Jiuicus inarifi})ius, FiyurisftjUs fer- 
ruginea, Saliconiia austral is, Fesuvium portulaafstrum L., 
and Suaeda australis. 
At present, in spite of the vigorous growth of Spinifex 
and Oenothera, tlie dunes must be regarded as only partly 
stabilised and much of it subject to continual topographical 
change as sand is blown from one position and deposited 
in another. This unstable condition will probably persist 
until a tree cover is developed, and it appears that this 
cover Avill, at least at first, consist mainly of Banksia, 
integrifoUa over the dunes and Casuarina glauca in the 
hollows. Progress towards the development of a tree cover 
seems up to the present to have been at a slow rate and this 
may in part be due to the probable scarcity of propagative 
material. The only close source of seed is the small group 
of trees at the southern-most end of the spit and any 
other seed must be carried by wind or water over the 
Xerang Iviver or liy wind from occasional trees south of 
the spit. Once the few small individuals of Banksia at 
pi'esent established oji the dunes begin to produce quan- 
tities of seed the development of a ti'ee cover may proceed 
at a considerably increased rate. 
A V k nowledgemen is 
The author is indebted to Mr. S. T. Blake and Mr. 
L. S. Smith for determination of numerous specieinns, and 
to Professor D. A. Ifei'bert for reading the manuscript. 
References 
Brooks, I. H. (1953). — Stradb oke Island erosion and Broadwater 
silting, Southport. Qld. Govt. Minnig jour, 54 (622) : 566-569, 
Connah, T. H. (1946). — Siradbroke Island erosion and Broadwater 
silting, Southport. Qld Govt. Mining Jour. 47 (542) : 370-373. 
A NEW ERIA FROM NORTH QUEENSLAND 
T. E. Hunt 
Eria- liparoides sp. nov. Khizoma vaide abbreviatum ; 
pseudobulbi circa Ibcm longi et 2.5-3cm lati, sulcati. Folia 
4, oblanceolata, suhacuta, circa •b5cm longa et 5 cm lata, 
basem . versus canaliculata et angustata, inultinervia. 
Racemus circa 30cm longus, multiflorus, erectus, fusco- 
